
pmid: 12167352
We consider the effect of coupling an otherwise chaotic population to a refuge. A rich set of dynamical phenomena is uncovered. We consider two forms of density dependence in the active population: logistic and exponential. In the former case, the basin of attraction for stable population growth becomes fractal, and the bifurcation diagrams for the active and refuge populations are chaotic over a wide range of parameter space. In the case of exponential density dependence, the dynamics are unconditionally stable (in that the population size is always positive and finite), and chaotic behavior is completely eradicated for modest amounts of dispersal. We argue that the use of exponential density dependence is more appropriate, theoretically as well as empirically, in a model of refuge dynamics.
Population Density, Stability of difference equations, dormancy, Ecology, chaos, spatial ecology, Population Dynamics, Plants, 530, Models, Biological, Dynamical systems in biology, exponential map, 510, seed bank, logistic map, Population dynamics (general), Fractals, Nonlinear Dynamics, dispersal
Population Density, Stability of difference equations, dormancy, Ecology, chaos, spatial ecology, Population Dynamics, Plants, 530, Models, Biological, Dynamical systems in biology, exponential map, 510, seed bank, logistic map, Population dynamics (general), Fractals, Nonlinear Dynamics, dispersal
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 15 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
